There is a chance that three out of every 100 Kenyans who underwent testing were erroneously informed that they are HIV-negative. In reality, they may be living with the virus.

And to prevent the mostly hypothetical risk of a false negative HIV test, blood from these potential donors could be individually screened using nucleic acid testing.

Erin Tompkins spoke briefly about her experience taking a Theranos test at a Walgreens store in Arizona in May 2015. Her test results, displayed in court, showed the detection of an HIV antibody.

Among 26,528 HIV RNA tests conducted during the open-label extension, researchers identified 22 isolated false-positive HIV RNA tests, for an overall false-positive rate of 0.08%.

An attorney for Elizabeth Holmes delved into the science of HIV testing during a brief cross examination of patient Erin Tompkins. Katherine Trefz walked Ms. Tompkins through the steps required to ...